. . . Aaron and his sons must wash their hands and feet at this laver every time they went in to minister, every morning, at least, Exod. 30:19-21. For this purpose clean water was put into the laver fresh every day. Though they washed themselves ever so clean at their own houses, that would not serve; they must wash at the laver, because that was appointed for washing, 2 Kgs. 5:12-14.
This was designed, (1.) To teach them purity in all their ministrations, and to possess them with a reverence of God’s holiness and a dread of the pollutions of sin. They must not only wash and be made clean when they were first consecrated, but they must wash and be kept clean whenever they went in to minister. He only shall stand in God’s holy place that has clean hands and a pure heart, Ps. 24:3, 4.
And, (2.) It was to teach us, who are daily to attend upon God, daily to renew our repentance for sin and our believing application of the blood of Christ to our souls for remission; for in many things we daily offend and contract pollution. . . (Matthew Henry, on Exodus 30:17-21)
Feature image by adore chang.